How to update Huawei P20 to Android 9

Question

I have recently bought a Huawei P20, but it cannot be updated to Android 9.



However, my old P10 has already been updated to Android 9 many months ago.



So how can the P20 be updated?


— askolotl | Sources

Answer

Problem solved: It was necessary to insert a SIM card. (I had tried it only with WLAN without SIM).


— askolotl | Sources

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